Earlier quoted context omitted.
In an economically idealized world, if someone pays above-market wages then you would expect a competitor to appear that will charge less to their customers while making the same profits, destroying the first business. Of course, in that idealized world, there are no "excess profits" (profits not commensurable with risk), so it should be impossible for the company to raise wages like that anyway. So the real question…
If we bring economics on the table, we can also turn it around: when you pay higher wages, you suddenly have a pool of better qualified employees to select from, increasing productivity / profits.
It actually appears more likely that employers have on average already set wages slightly above the market-clearing level in order to improve productivity and maximize profits. This is the theory of "efficiency wages" [1], which tries to explain why unemployment persists when companies could cut wages and employ more people.
There is no free lunch.
[1] http://marginalrevolution.com/marginalrevolution/2015/04/the...